Wheel set driving system and locomotive

Abstract

The invention provides a wheel set driving system and a locomotive, and relates to the technical field of railway vehicles. The motor is provided with a shell and a motor shaft, and the shell comprises a first end face with an opening; the gear box comprises a second end face, the second end face abuts against the first end face, one end of the gear shaft extends to the opening, and the gear shaft is in butt joint with the motor shaft; the first connecting assembly comprises a first connecting piece, a second connecting piece and a third connecting piece which are used for connecting the shell and the box body; the first connecting piece is arranged at the first position, and the first connecting piece is used for restraining the motor and the gearbox in the first direction; the second connecting piece is arranged at the second position, and the second connecting piece is used for restraining the motor and the gear box in the second direction; the third connecting piece is arranged at the third position and used for restraining the relative displacement of the motor and the gearbox. The gearbox is directly connected with the motor shell, so that the axial space of the system is increased, and the structural compactness of the system is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rail vehicles, and in particular to a wheelset drive system and a locomotive. Background Art

[0002] As the part of the locomotive vehicle that contacts the rails, the wheelset consists of two left and right wheels firmly pressed onto the same axle. Its function is to ensure the running and steering of the locomotive vehicle on the rails, bear all static and dynamic loads from the locomotive vehicle, transfer them to the rails, and transfer the loads caused by the unevenness of the line to the various parts of the locomotive vehicle. In addition, the driving and braking of the locomotive vehicle are also affected by the wheelset. The correct assembly and function of the wheelset are crucial to the normal operation of the locomotive. Therefore, the functionality of the locomotive wheel drive system has become one of the important factors in the reliability and safety of the locomotive operation.

[0003] At present, since the distance between the two rails in the track is fixed, the distance between the two wheels in the wheelset drive system is fixed, and the space provided for installing structures such as motors and gearboxes in the system is limited, the performance of various structures in the existing drive system is difficult to meet the traction performance requirements of high-power and high-torque locomotives.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of this, a wheelset drive system and a locomotive are provided. The wheelset drive system integrates a gearbox directly on a motor, thereby increasing the axial space of the system and improving the structural compactness of the system while ensuring connection reliability.

[0006] Other features and advantages of the present disclosure will become apparent from the following detailed description, or may be learned in part by the practice of the present disclosure.

[0007] According to one aspect of the present disclosure, a wheelset drive system is provided, the system comprising:

[0008] A wheel axle, with wheels disposed on both sides of the wheel axle;

[0009] A motor having a housing and a motor shaft disposed in the housing, wherein the housing comprises a first end surface, an opening is formed on the first end surface, and the motor shaft passes through the opening;

[0010] A gear box, comprising a box body and a gear shaft disposed in the box body, wherein the box body comprises a second end face, the second end face abuts against the first end face, one end of the gear shaft extends to the opening, and the gear shaft abuts against the motor shaft;

[0011] The first connection component comprises:

[0012] a first connecting member, connecting the housing and the box body, and the first connecting member is arranged at a first position, the first position being a position close to both the edge of the first end face and the edge of the second end face, the first connecting member being used to constrain the motor and the gear box in a first direction, the first direction being a direction perpendicular to the axis of the wheel axle;

[0013] a second connecting member, connecting the housing and the box body, and the second connecting member is arranged at a second position, the second position being a position between the first position and the motor shaft in the first direction, the second connecting member being used to constrain the motor and the gear box in a second direction, the second direction being a circumferential direction of the wheel axle;

[0014] A third connecting member connects the outer shell and the box body, and the third connecting member is arranged at a third position, the third position is a position away from the first position in the first direction and close to the edge of the first end face and the edge of the second end face, and the third connecting member is used to constrain the relative displacement of the motor and the gear box.

[0015] In an exemplary embodiment of the present disclosure, the system further includes an elastic connector, which is disposed between the motor shaft and the gear shaft, and the motor shaft and the gear shaft are connected via the elastic connector.

[0016] In an exemplary embodiment of the present disclosure, the system further includes a connecting sleeve, which is sleeved on the wheel axle and disposed between one of the wheels and the gear box, and the connecting sleeve is connected to the gear box via a second connecting assembly.

[0017] In an exemplary embodiment of the present disclosure, the second connecting assembly includes a fourth connecting member, the fourth connecting member includes a second inner stop and a second outer stop, the second inner stop and the second outer stop are respectively arranged at the end of the connecting sleeve and the end of the box body, and the fourth connecting member is used to constrain the connecting sleeve and the gear box in the first direction.

[0018] In an exemplary embodiment of the present disclosure, the second connecting assembly also includes a fifth connecting member, the fifth connecting member includes a second bolt arranged at the end of the connecting sleeve and a second bolt hole arranged at the end of the housing, the second bolt is adapted to the second bolt hole, and the fifth connecting member is used to constrain the relative displacement between the connecting sleeve and the gear box.

[0019] In an exemplary embodiment of the present disclosure, the system further includes a third connecting assembly, and the housing of the motor is connected to a circumferential position of the connecting sleeve through the third connecting assembly.

[0020] In an exemplary embodiment of the present disclosure, the third connecting component includes a sixth connecting member, the sixth connecting member includes a third outer stop arranged on the outer surface of the connecting sleeve and a third inner stop arranged on the outer shell, the third outer stop is adapted to the third inner stop, and the sixth connecting member is used to constrain the motor and the connecting sleeve in the second direction.

[0021] In an exemplary embodiment of the present disclosure, the third connecting component includes a seventh connecting member, and the seventh connecting member includes a positioning groove and a positioning key respectively arranged at the circumferential position of the outer shell and the connecting sleeve, the positioning groove and the positioning key are adapted, and the seventh connecting member is used to constrain the connecting sleeve and the motor in the first direction.

[0022] In an exemplary embodiment of the present disclosure, the third connecting assembly also includes an eighth connecting member, the eighth connecting member includes a third bolt arranged at the end of the connecting sleeve and a third bolt hole arranged at the end of the outer shell, the third bolt is adapted to the third bolt hole, and the eighth connecting member is used to constrain the relative displacement between the connecting sleeve and the motor.

[0023] According to another aspect of the present disclosure, a locomotive is provided, comprising the above-mentioned wheelset drive system.

[0024] The wheelset drive system provided by the present invention directly connects the first end face of the motor with the second end face of the gear box, and one end of the gear shaft extends into the opening, the gear shaft is connected to the motor shaft, and the motor housing and the gear box body are connected through a first connecting component. The gear box body can be directly connected to the motor housing without the need to use other components to achieve the connection between the gear box body and the motor housing. While ensuring the connection strength of the system, the integration of the gear box function is achieved, the axial space of the system is saved, the compactness of the system structure is improved, and the subsequent high-power and high-torque functional requirements of the system can be met.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0027] Figure 1 It is a schematic structural diagram of a wheelset drive system in an exemplary embodiment of the present disclosure.

[0028] Figure 2 It is a first cross-sectional view of a wheelset drive system in an exemplary embodiment of the present disclosure.

[0029] Figure 3 It is a second cross-sectional view of a wheelset drive system in an exemplary embodiment of the present disclosure.

[0030] Figure 4 It is a partial structural schematic diagram of a wheelset drive system in an exemplary embodiment of the present disclosure.

[0031] Figure 5 It is a third cross-sectional view of a wheelset drive system in an exemplary embodiment of the present disclosure.

[0032] Figure 6 It is a fourth cross-sectional view of a wheelset drive system in an exemplary embodiment of the present disclosure.

[0033] Figure 7 It is a schematic structural diagram of a wheelset drive system including a suspension in an exemplary embodiment of the present disclosure.

[0034] The reference numerals are described as follows:

[0035] 10. Motor; 101. Motor shaft; 102. Housing; 20. Gearbox; 201. Box; 202. Gear shaft; 30. Connecting sleeve; 40. Axle; 50. Wheel; 60. Elastic connector; 701. First connecting component; 702. Second connecting component; 703. Third connecting component; 711. First connecting member; 712. Second connecting member; 713. Third connecting member; 714. Fourth connecting member; 715. Fifth connecting member; 716. Sixth connecting member; 717. Seventh connecting member; 718. Eighth connecting member; 80. Suspension. DETAILED DESCRIPTION

[0036] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0037] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0038] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0039] In related technologies, the wheelset drive system serves as the power output unit of the traction locomotive. It converts electrical energy into mechanical energy through the traction motor, and transmits the output torque of the traction motor to the wheelset through the transmission gearbox system. The wheelset then generates wheel-rail adhesion by contacting the rails to achieve the traction or braking force of the locomotive. Therefore, the output torque power of the wheelset drive system determines its working capacity.

[0040] The existing wheel set drive system mainly includes a traction motor and a gearbox. The motor has a housing, and the housing includes an end cover, through which the motor and the gearbox are rigidly connected. The existing wheel set drive system is limited by the track system, and the installation space provided for its internal structure is also limited. The motor and gearbox with large traction and torque are often large in size, which results in the inability to provide a motor and gearbox that meet the large traction requirements within the limited installation space, resulting in limited system functions.

[0041] Based on this, the embodiment of the present disclosure provides a wheel set drive system, such as Figure 2 As shown, combined Figure 1The system includes: an axle 40, a motor 10, a gear box 20 and a first connecting component 701.

[0042] Wherein, wheels 50 are respectively arranged on both sides of the wheel axle 40; the motor 10 has a housing 102 and a motor shaft 101 arranged in the housing 102, the housing 102 includes a first end surface, an opening is opened on the first end surface, and the motor shaft 101 is passed through the opening; the gear box 20 has a box body 201 and a gear shaft 202 arranged in the box body 201, the box body 201 includes a second end surface, the second end surface abuts against the first end surface, one end of the gear shaft 202 extends to the opening, and the gear shaft 202 is butted against the motor shaft 101;

[0043] The first connection component 701 includes:

[0044] A first connecting member 711 connects the housing 102 and the box body 201, and the first connecting member 711 is disposed at a first position, which is a position close to both the edge of the first end face and the edge of the second end face. The first connecting member 711 is used to constrain the motor 10 and the gear box 20 in a first direction, and the first direction is a direction perpendicular to the axis of the wheel axle 40;

[0045] A second connecting member 712 connects the housing 102 and the box body 201, and the second connecting member 712 is disposed at a second position, which is a position between the first position and the motor shaft 101 in the first direction, and the second connecting member 712 is used to constrain the motor 10 and the gear box 20 in the second direction, which is the circumferential direction of the wheel axle 40;

[0046] The third connecting member 713 connects the outer shell 102 and the box body 201, and the third connecting member 713 is set at a third position, which is a position away from the first position in the first direction and close to the edge of the first end face and the edge of the second end face. The third connecting member 713 is used to constrain the relative displacement between the motor 10 and the gear box 20.

[0047] The wheelset drive system provided by the present invention directly connects the first end face of the motor 10 with the second end face of the gear box 20, and one end of the gear shaft 202 extends into the opening, the gear shaft 202 is docked with the motor shaft 101, and the motor 10 housing 102 is connected to the housing 201 of the gear box 20 through the first connecting component 701. The housing 102 of the motor 10 is connected to the housing 201 of the gear box 20, and there is no need to use other components to achieve the connection between the housing 201 of the gear box 20 and the housing 102 of the motor 10. While ensuring the connection strength of the system, the function of the gear box 20 is integrated, the axial space of the system is saved, the compactness of the system structure is improved, and the subsequent functional requirements of high power and high torque of the system can be met.

[0048] The various parts of the wheelset drive system provided by the embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings:

[0049] In the embodiments provided in the present disclosure, Figure 1 As shown, the system includes an axle 40, and wheels 50 are respectively arranged on both sides of the axle 40, wherein the diameter of the wheel 50 can be between 1370 mm (millimeter) and 2000 mm. According to different locomotive types, different values ​​can be selected for the diameter of the wheel 50. For example, the diameter of the wheel 50 of an electric locomotive can be 1250 mm. The wheelset drive system of the following embodiment of the present disclosure is described by taking the application to an electric locomotive as an example. The parameters such as the length of the axle 40 and the size of the wheel 50 in the electric locomotive can adopt the parameters commonly used in the art, which will not be listed one by one here, but adaptive adjustment or deformation can be performed for different types of locomotives.

[0050] Among them, Figure 1 As shown, the system includes a motor 10, and the motor 10 can provide traction or braking force for the system. The performance parameters such as the power of the motor 10 can be set according to the parameters such as the size of the motor 10. For example, the larger the size of the motor 10, the larger the maximum power that the motor 10 can provide. In the present disclosure, the motor 10 has a housing 102 and a motor shaft 101 disposed in the housing 102, wherein the housing 102 includes a first end face, and the first end face has an opening, and the motor shaft 101 is inserted into the opening.

[0051] like Figure 1 As shown, the system includes a gearbox 20, which includes a housing 201 and a gear shaft 202. The housing 201 includes a second end face, which is in contact with the first end face. One end of the gear shaft 202 extends to the opening, and the gear shaft 202 is in contact with the motor shaft 101. A driving gear is installed on the circumferential position of the gear shaft 202. In addition, the wheel shaft 40 is also inserted into the housing 201 of the gearbox 20, and the axial extension direction of the wheel shaft 40 is parallel to the axial extension direction of the gear shaft 202. A driven gear is installed on the circumferential position of the wheel shaft 40, and the driving gear and the driven gear are meshed. In the present disclosure, the gear shaft 202 is driven to rotate by the motor shaft 101, so that the driving gear drives the driven gear to rotate in meshing, so as to drive the wheel shaft 40 to rotate through the driven gear, so as to provide traction for the system.

[0052] Among them, the driving gear and the driven gear can be one of cylindrical spur gears or cylindrical helical gears, which can be selected according to the specific design requirements of the system structure.

[0053] In one embodiment provided by the present disclosure, Figure 3As shown, the motor shaft 101 and the gear shaft 202 can be connected by an elastic connector 60, wherein the elastic connector 60 is disposed between the motor shaft 101 and the gear shaft 202, and the elastic connector 60 can be an elastic ring, a plum blossom-shaped elastic coupling, a serpentine spring coupling, etc. Connecting the motor shaft 101 and the gear shaft 202 by the elastic connector 60 can increase the connection strength of the two and provide connection reliability, and can also reduce the wear of the connection between the motor shaft 101 and the gear shaft 202 and increase the service life of the two.

[0054] In another embodiment provided by the present disclosure, the motor shaft 101 and the gear shaft 202 can be connected through the ends. For example, during the manufacturing process, a conical connector can be formed at the end of the motor shaft 101, and a conical hole can be formed at the end of the gear shaft 202. The connection between the motor shaft 101 and the gear shaft 202 can be achieved by interference fit between the conical connector and the conical hole. Of course, a conical hole can also be formed at the end of the motor shaft 101, and a conical connector can be formed at the end of the gear shaft 202; the connection between the two is not limited to a conical connection, and other types of connection methods can be selected according to actual design requirements to meet design requirements.

[0055] In this system, the connection between the motor shaft 101 and the gear shaft 202 can be achieved, but since the motor shaft 101 and the gear shaft 202 are the main working parts of the system, which are the parts providing traction or braking force, the connection between the two alone is not enough to provide sufficient connecting force for the motor 10 and the gear box 20.

[0056] In the present disclosure, since the housing 102 of the motor 10 does not include an end cover, the housing 201 of the gear box 20 is used as the end cover of the motor 10, and the housing 201 of the gear box 20 is directly integrated with the housing 102 of the motor 10. However, the existing gear box 20 does not have a structure directly integrated with the housing 102 of the motor 10. In order to ensure the connection strength between the motor 10 and the gear box 20, as shown in FIG. Figure 2 As shown, combined Figure 1 The system provided by the present disclosure further includes a first connecting component 701 , which is used to connect the housing 102 of the motor 10 and the housing 201 of the gear box 20 .

[0057] Among them, Figure 2As shown, the first connecting component 701 includes a first connecting member 711, which connects the shell 102 and the box body 201, and the first connecting member 711 is set at a first position, which is a position close to the edge of the first end face and the edge of the second end face at the same time. The first connecting member 711 is used to constrain the motor 10 and the gear box 20 in a first direction, and the first direction is perpendicular to the axial direction of the axle 40.

[0058] The first connector 711 may include a first inner stop and a first outer stop, wherein the first outer stop may be set at a first position corresponding to the first end face of the motor 10 housing 102, and the first inner stop may be set at a first position corresponding to the second end face of the gearbox 20 housing 201. Through the cooperation between the first inner stop and the first outer stop, radial constraints on the motor 10 and the gearbox 20 may be achieved, that is, the motor 10 and the gearbox 20 are constrained in the first direction to avoid the motor 10 and the gearbox 20 from being separated from each other in the first direction during operation, thereby protecting the system components from damage. Of course, the setting positions of the first inner stop and the first outer stop may be interchangeable, and may be set according to the specific structures of the motor 10 housing 102 and the gearbox 20 housing 201.

[0059] Among them, Figure 2 As shown, the first connecting component 701 includes a second connecting member 712, which connects the housing 102 and the box body 201, and the second connecting member 712 is arranged at a second position, which is a position between the first position and the motor shaft 101 in the first direction, and the second connecting member 712 is used to constrain the motor 10 and the gearbox 20 in the second direction, which is the circumferential direction of the axle 40.

[0060] The second connecting member 712 may include a first sub-positioning key and two first sub-positioning grooves, wherein one first sub-positioning groove may be provided on the first end face of the housing 102 of the motor 10, and the other first sub-positioning groove may be provided on the second end face of the housing 201 of the gearbox 20, the positions of the two first sub-positioning grooves correspond to each other, and the two first sub-positioning grooves form an integral sub-positioning groove, and the first sub-positioning member may be inserted into the sub-positioning groove to constrain the motor 10 and the gearbox 20 in the second direction. The first sub-positioning groove and the first sub-positioning key may be rectangular, and the matching relationship between the rectangular positioning groove and the positioning key is used to limit the motor 10 and the gearbox 20 from relative circular motion, thereby ensuring the fixed connection relationship between the motor 10 and the gearbox 20.

[0061] The second connecting member 712 is arranged closer to the wheel axle 40 than the first connecting member 711. This arrangement position can reduce the force on the second connecting member 712 when constraining the motor 10 and the gear box 20 in the circumferential direction, thereby increasing the service life of the second connecting member 712.

[0062] Among them, Figure 2 As shown, the first connecting component 701 includes a third connecting member 713, which connects the shell 102 and the box body 201, and the third connecting member 713 is arranged at a third position, which is a position away from the first position in the first direction and close to the edge of the first end face and the edge of the second end face at the same time. The third connecting member 713 is used to constrain the relative displacement between the motor 10 and the gear box 20.

[0063] The third connecting member 713 may include a first bolt and a first bolt hole, wherein the first bolt hole penetrates the housing 201 of the gearbox 20 in a direction parallel to the gear shaft 202 and extends to a corresponding position of the housing 102 of the motor 10, and a thread is provided in the first bolt hole. By screwing the first bolt into the first bolt hole, a rigid connection between the motor 10 and the gearbox 20 can be achieved, and at the same time, the relative displacement between the motor 10 and the gearbox 20 is limited by the third connecting member 713, thereby ensuring the reliability of the connection between the two. In addition, the third connecting member 713 is located at a position away from the gear shaft 202 relative to the first connecting member 711 and the second connecting member 712, so that the alignment relationship between the housing 201 of the gearbox 20 and the housing 102 of the motor 10 can be ensured, and the connection strength of the third connecting member 713 can also be improved.

[0064] In the embodiments provided in the present disclosure, Figure 1 As shown, combined Figure 3 and Figure 4 The system further includes a connecting sleeve 30, which is sleeved on the wheel axle 40 and disposed between a wheel 50 and the gearbox 20, and the connecting sleeve 30 and the gearbox 20 are connected via a second connecting assembly 702. In the present disclosure, the connecting sleeve 30 is sleeved on the wheel axle 40, and the wheel axle 40 is passed through the gearbox 20 housing 201, and one end of the connecting sleeve 30 abuts against the gearbox 20 housing 201.

[0065] Among them, Figure 3 As shown, the second connecting component 702 includes a fourth connecting member 714, and the fourth connecting member 714 includes a second inner stop and a second outer stop. The second inner stop and the second outer stop are respectively arranged at the end of the connecting sleeve 30 and the end of the box body 201. The fourth connecting member 714 is used to constrain the connecting sleeve 30 and the gear box 20 in the first direction.

[0066] The second outer stop can be set at the end where the connecting sleeve 30 abuts against the housing 201 of the gear box 20, and the second inner stop can be set at the end of the housing 201 of the gear box 20. Through the cooperation between the second inner stop and the second outer stop, it can be achieved that the connecting sleeve 30 and the gear box 20 will not make relative circular motion, thereby ensuring the fixed connection relationship between the motor 10 and the gear box 20. Of course, the setting positions of the second inner stop and the second outer stop can also be exchanged according to design requirements, and the structure and size of the fourth connecting member 714 can be the same or similar to the structure and size of the second connecting member 712.

[0067] Among them, Figure 4 As shown, the second connecting component 702 also includes a fifth connecting member 715, which includes a second bolt arranged at the end of the connecting sleeve 30 and a second bolt hole arranged at the end of the box body 201, the second bolt is adapted to the second bolt hole, and the fifth connecting member 715 is used to constrain the relative displacement between the connecting sleeve 30 and the gear box 20.

[0068] In order to further improve the reliability of the connection between the connecting sleeve 30 and the housing 201 of the gearbox 20, a flange ear flap can be provided at a circumferential position of the connecting sleeve 30 close to one end of the gearbox 20, and the flange ear flap can be attached to the surface of the housing 201 of the gearbox 20. By opening a second bolt hole at a relative position of the housing 201 of the gearbox 20, the second bolt is connected to the second bolt hole, thereby ensuring the connection strength between the connecting sleeve 30 and the gearbox 20. It should be noted that the number of second bolts provided on the flange ear flap on the connecting sleeve 30 can be adjusted and selected according to the required connection strength of the two or the structural design of the connecting sleeve 30, which will not be described in detail here.

[0069] In the embodiments provided in the present disclosure, Figure 5 and Figure 6 As shown, combined Figure 1 The connecting sleeve 30 and the housing 102 of the motor 10 are connected via a third connecting component 703 , and the housing 102 of the motor 10 is connected to a circumferential position of the connecting sleeve 30 via the third connecting component 703 .

[0070] Among them, Figure 5 As shown, the third connecting component 703 includes a sixth connecting member 716, which includes a third outer stopper arranged on the outer surface of the connecting sleeve 30 and a third inner stopper arranged on the outer shell 102, the third outer stopper is adapted to the third inner stopper, and the sixth connecting member 716 is used to constrain the motor 10 and the connecting sleeve 30 in the second direction.

[0071] The third inner stop can be arranged on the outer surface of the motor 10 housing 102, and a depression is formed on the motor 10 housing 102 so that the depression is adapted to the outer shape of the one-piece sleeve, thereby ensuring that part of the outer surface of the connecting sleeve 30 can be placed in the depression of the motor 10. A third inner stop is formed at the junction of the depression and the motor 10 housing 102, such as a third inner stop similar to a step can be formed at the junction of the depression and the motor 10 housing 102, and a third outer stop adapted to the third inner stop is formed at the corresponding position of the connecting sleeve 30. Through the cooperation between the third inner stop and the third outer stop, the connecting sleeve 30 and the motor 10 are constrained in the circumferential direction, so as to avoid relative displacement of the connecting sleeve 30 and the motor 10 in the circumferential direction, thereby ensuring the connection strength between the two.

[0072] Among them, Figure 6 As shown, the third connecting component 703 includes a seventh connecting member 717, which includes positioning grooves and positioning keys respectively arranged on the circumferential positions of the outer shell 102 and the connecting sleeve 30, and the positioning grooves and the positioning keys are adapted to each other. The seventh connecting member 717 is used to constrain the connecting sleeve 30 and the motor 10 in the first direction.

[0073] The seventh connecting member 717 may include a second sub-positioning key and two second sub-positioning grooves, wherein one second sub-positioning groove may be provided on the side where the housing 102 of the motor 10 contacts the outer surface of the connecting sleeve 30, and the other second sub-positioning groove may be provided on the outer surface of the connecting sleeve 30, the positions of the two second sub-positioning grooves correspond to each other, and the two second sub-positioning grooves form an integral sub-positioning groove, and the second sub-positioning member may be inserted into the sub-positioning groove to constrain the connecting sleeve 30 and the motor 10 in the first direction. The second sub-positioning groove and the second sub-positioning key may be in the form of a rectangular parallelepiped, and the matching relationship between the rectangular parallelepiped positioning groove and the positioning key is used to limit the relative movement between the motor 10 and the sleeve in the direction perpendicular to the axis of the wheel shaft 40, thereby ensuring the fixed connection relationship between the motor 10 and the connecting sleeve 30.

[0074] Among them, Figure 5 As shown, the third connecting component 703 also includes an eighth connecting member 718, which includes a third bolt arranged at the end of the connecting sleeve 30 and a third bolt hole arranged at the end of the housing 102, the third bolt is adapted to the third bolt hole, and the eighth connecting member 718 is used to constrain the relative displacement between the connecting sleeve 30 and the motor 10.

[0075] In order to further tighten the motor 10 and the connecting sleeve 30 and ensure that the two will not loosen under the movement vibration of the system, an eighth connecting member 718 is also arranged between the connecting sleeve 30 and the motor 10. The eighth connecting member 718 includes a third bolt and a third bolt hole. The tight connection between the motor 10 and the connecting sleeve 30 is ensured through the matching connection between the third bolt and the third bolt hole.

[0076] In the embodiments provided in the present disclosure, in order to meet the system's working load and operating speed and other parameter requirements, the bearings of the motor shaft 101 can be cylindrical roller bearings or cylindrical roller bearings combined with ball bearings and other forms of bearings; the bearings of the axle 40 can be cylindrical roller bearings or tapered roller bearings and other forms of bearings, and the models and types of the above bearings can be adaptively selected according to the structural space of the system. In addition, sealing structures and lubrication structures, such as sealing rings, can be set between the components according to the requirements of the internal structure of the drive system. Of course, other structures not mentioned in the present disclosure may be structures commonly used in the art or obtained by appropriately deforming these conventional structures.

[0077] In the system provided by the present invention, the motor 10 and the gearbox 20 are fastened together by the first connecting component 701, the gearbox 20 and the connecting sleeve 30 are fastened together by the second connecting component 702, and the motor 10 and the connecting sleeve 30 are fastened together by the third connecting component 703. On the basis of omitting the end cover of the motor 10, the fastening connection among the motor 10, the gearbox 20 and the connecting sleeve 30 is achieved, thereby ensuring the reliability of the system and realizing a compact structural design. On the one hand, a larger component layout space can be provided for the subsequent improvement of parameters such as the power of the motor 10 or the torque of the gearbox 20; on the other hand, the connection strength and other parameters of this improved system structure are relatively high, which can meet the requirements of the locomotive operating conditions and ensure the reliability of the system.

[0078] The present disclosure provides a locomotive, such as Figure 7 As shown, combined Figures 1 to 6 , including the above-mentioned wheelset drive system.

[0079] The locomotive includes a bogie, and the bogie is connected to a wheelset drive system. The wheelset drive system also includes a suspension 80, which is disposed on one side of the motor 10. The suspension 80 can be used to hang the system on the bogie of the locomotive to prevent the wheelset drive system from rubbing against the ground, thereby improving the reliability of the locomotive. In addition, the locomotive disclosed in the present invention includes the above-mentioned wheelset drive system, which can increase the power of the locomotive and thus improve the performance of the locomotive.

[0080] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A wheelset drive system, characterized in that: include: A wheel axle, with wheels disposed on both sides of the wheel axle; A motor having a housing and a motor shaft disposed in the housing, wherein the housing comprises a first end surface, an opening is formed on the first end surface, and the motor shaft passes through the opening; A gear box, comprising a box body and a gear shaft disposed in the box body, wherein the box body comprises a second end face, the second end face abuts against the first end face, one end of the gear shaft extends to the opening, and the gear shaft abuts against the motor shaft; The first connection component comprises: a first connecting member, connecting the housing and the box body, and the first connecting member is arranged at a first position, the first position being a position close to both the edge of the first end face and the edge of the second end face, the first connecting member being used to constrain the motor and the gear box in a first direction, the first direction being a direction perpendicular to the axis of the wheel axle; a second connecting member, connecting the housing and the box body, and the second connecting member is arranged at a second position, the second position being a position between the first position and the motor shaft in the first direction, the second connecting member being used to constrain the motor and the gear box in a second direction, the second direction being a circumferential direction of the wheel axle; A third connecting member connects the outer shell and the box body, and the third connecting member is arranged at a third position, the third position is a position away from the first position in the first direction and close to the edge of the first end face and the edge of the second end face, and the third connecting member is used to constrain the relative displacement of the motor and the gear box.

2. The wheelset drive system according to claim 1, characterized in that: The system further comprises an elastic connector, which is arranged between the motor shaft and the gear shaft, and the motor shaft and the gear shaft are connected via the elastic connector.

3. The wheelset drive system according to claim 1 or 2, characterized in that: The system further comprises a connecting sleeve, wherein the connecting sleeve is sleeved on the wheel axle and arranged between one of the wheels and the gear box, and the connecting sleeve is connected to the gear box via a second connecting assembly.

4. The wheelset drive system according to claim 3, characterized in that: The second connecting component includes a fourth connecting member, which includes a second inner stop and a second outer stop, wherein the second inner stop and the second outer stop are respectively arranged at the end of the connecting sleeve and the end of the box body, and the fourth connecting member is used to constrain the connecting sleeve and the gear box in the first direction.

5. The wheelset drive system according to claim 4, characterized in that: The second connecting assembly also includes a fifth connecting member, which includes a second bolt arranged at the end of the connecting sleeve and a second bolt hole arranged at the end of the box body, the second bolt is adapted to the second bolt hole, and the fifth connecting member is used to constrain the relative displacement between the connecting sleeve and the gear box.

6. The wheelset drive system according to claim 3, characterized in that: The system further comprises a third connection assembly, and the housing of the motor is connected to a circumferential position of the connection sleeve via the third connection assembly.

7. The wheelset drive system according to claim 6, characterized in that: The third connecting component includes a sixth connecting member, which includes a third outer stop arranged on the outer surface of the connecting sleeve and a third inner stop arranged on the outer shell, the third outer stop is adapted to the third inner stop, and the sixth connecting member is used to constrain the motor and the connecting sleeve in the second direction.

8. The wheelset drive system according to claim 6, characterized in that: The third connecting component includes a seventh connecting member, which includes a positioning groove and a positioning key respectively arranged on the circumferential position of the outer shell and the connecting sleeve, the positioning groove and the positioning key are adapted to each other, and the seventh connecting member is used to constrain the connecting sleeve and the motor in the first direction.

9. The wheelset drive system according to claim 6, characterized in that: The third connecting component also includes an eighth connecting member, which includes a third bolt arranged at the end of the connecting sleeve and a third bolt hole arranged at the end of the outer shell, the third bolt is adapted to the third bolt hole, and the eighth connecting member is used to constrain the relative displacement between the connecting sleeve and the motor.

10. A locomotive, characterized in that: Comprising a wheelset drive system as described in any one of claims 1-9.

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